<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      // 函数{方法}执行特点任务
      let nam1 = +prompt("请输入第一个数");
      let nam2 = +prompt("请输入第一个数");

      function getSum(a, b) {
        let sum = 0;
        for (let i = a; i <= b; i++) {
          sum += i;
        }
        return sum;
      }
      const re = getSum(nam1, nam2);
      console.log(re);
    </script>
  </body>
</html>
